Oesophagus Flashcards
What is the swallowing reflex co-ordinated by
Medulla oblongata, which stimulates the appropriate sequence of contraction and relaxation in the participating skeletal muscle, sphincters and smooth muscle groups
How is swallowed food delivered to stomach
Co-ordinated sequence of contraction and relaxation in the upper oesophageal sphincter, oesophagus and lower oesophageal sphincter

Difference in muscle in the oesophagus

Pressure changes in oesophagus during swallowing

Simultaneous manometry and fluoroscopy of barium swallow in a normal subject

Central control of peristalsis in the smooth muscle portion of the oesophagus
Short delay - top sphincter
Long delay - lower sphincter

Electrical stimulation of intrinsic nerves in circular smooth muscle strips

Characteristics of muscle fibres

Pressure in oesophagus
Decreasing pressure in thoracic cavity in inhalation => increasing pressure in abdominal cavity
